I Squared Capital Leads $5B Acquisition of Matterhorn Express Pipeline

Overview of the Acquisition

In a major move within the energy infrastructure space, a consortium led by I Squared Capital has agreed to acquire significant equity interests in the Matterhorn Express Pipeline, a critical natural gas route running 580 miles from the Permian Basin in West Texas and New Mexico to the Katy area near Houston.

• WhiteWater Development LLC, backed by I Squared and First Infrastructure Capital (FIC), will own 65%.
• Enbridge Inc. and MPLX LP will each own 10%.
• The remaining 15% ownership was not specified in detail, but MPLX also separately acquired an additional 5% interest for $151 million, implying prior existing ownership.

While the exact financial terms weren’t disclosed, reports suggest the deal could value the Matterhorn pipeline at over $5 billion including debt.

About the Pipeline

The Matterhorn Express Pipeline began operations in late 2023 and is capable of transporting up to 2.5 billion cubic feet per day (Bcf/d) of natural gas. It plays a strategic role in relieving bottlenecks in one of the most productive natural gas regions in the U.S.—the Permian Basin—by moving output to the Gulf Coast, where it can be processed, stored, or exported.

Ownership Structure Post-Acquisition

The following table outlines the ownership distribution of the Matterhorn Express Pipeline following the completion of the transaction:

Strategic Significance of the Deal (Summary)

The majority stake acquisition in the Matterhorn Express Pipeline by I Squared Capital, Enbridge Inc., and MPLX LP is a calculated bet on U.S. natural gas infrastructure and global energy trends.

1. Energy Demand & Infrastructure: The pipeline supports surging Permian Basin gas production and eases transport bottlenecks, feeding LNG exports to Europe and Asia amid shifting global supply chains.
2. Stable, Inflation-Protected Returns: Backed by long-term, inflation-linked contracts with top producers like Devon Energy, the pipeline offers steady cash flows—attractive in today’s uncertain markets.
3. Energy Security & Export Growth: With access to Gulf Coast LNG terminals, the asset enhances U.S. export capacity, supporting long-term global LNG demand growth, particularly in Asia.
4. WhiteWater’s Growth: WhiteWater, backed by I Squared, expands its Texas footprint, adding Matterhorn to existing assets like Whistler and Agua Blanca—strengthening future strategic options.
5. Diversification for Enbridge & MPLX: The deal offers Enbridge U.S. gas exposure and gives MPLX a key Permian trunkline, expanding both companies' midstream reach without full operational risk.
6. Regulatory & ESG Alignment: Completed in 2024, the pipeline meets modern environmental standards and fits ESG goals as a low-leakage, efficient natural gas system supporting the energy transition.

Future Outlook

The deal is anticipated to close in the second quarter of 2025, pending typical regulatory approvals. Following the acquisition, WhiteWater will continue to operate the Matterhorn Express Pipeline to maintain business continuity and service delivery.

I Squared Capital and its co-investors are optimistic about natural gas's long-term sustainability as a significant energy source. 

Assets such as infrastructure, such as the Matterhorn Express Pipeline, will be fundamental in satisfying global energy needs as the energy market continues to grow.

Understanding the Deal: Private Equity, Midstream Assets, and Infrastructure Investing

How do these types of transactions work, and why are they so important?

1. What Is Private Equity Doing in Natural Gas?

Firms like I Squared Capital and Ridgemont Equity Partners are private equity investors. Their role is to buy, improve, and eventually sell stakes in companies or infrastructure projects to generate returns for their investors. In this case, Ridgemont and Devon Energy (an oil and gas producer) are selling their stakes, cashing in on their earlier investment.

Private equity firms are especially active in "midstream" infrastructure like pipelines, terminals, and storage assets that earn steady, toll-like income regardless of market volatility. These are attractive because they offer predictable cash flow and relatively low operating risk once built.

2. Why Is Debt Included in the Valuation?

When we say the Matterhorn pipeline could be worth $5 billion "including debt", this is a reference to Enterprise Value (EV), a key metric in dealmaking.

Enterprise Value = Equity Value + Net Debt

Even if the buyers only pay a portion in cash (the equity), they also assume responsibility for the pipeline’s existing debt, which adds to the total cost. This is important because it reflects the true cost of acquiring the entire business.

3. What Are the Strategic Benefits?

For I Squared and its partners, the deal strengthens their position in energy infrastructure. I Squared already owns a stake in the Whistler Pipeline, another Permian-based gas route, and expanding its midstream portfolio offers scale, synergy, and reliable income.

Companies like Enbridge and MPLX (a subsidiary of Marathon Petroleum) are traditional midstream players. Their involvement ensures experienced operations and allows them to deepen their integration into U.S. natural gas logistics.

4. How Do These Deals Get Financed?

Deals of this size often involve a mix of:

• Equity (cash or shares paid by the acquiring parties)
• Debt financing (loans or bonds raised to fund the acquisition)
• Partnership structures (multiple investors pooling capital and splitting ownership)

WhiteWater’s continued role as the pipeline’s operator is also significant. It allows continuity in day-to-day management, while the new financial backers (I Squared and FIC) focus on broader strategy and returns.

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